having major problems correctly intonating

its like no matter how much I turn the screws it doent do anything.
the tuner's still got the little needle going ot the same spot, no matter how much I adjust it. The only string taht is set up "perfectly" is the D (I have a 4 string bass strung EADG). Any ideas?

it seems it just takes mopre turns than id thought to change it. I thought it would be about as sensitive as the tuners but I was wrong. My bass is now perfectly intonated. Took long enough though-2 1/2 hours for 4 strings.

Yes, keep turning. The g string saddle on my new 98 Fender AM P bass took some major moving before it was perfectly intonated. The saddle is about even with the d saddle now, but all notes are in tune.

If it's a standard stamped bridge, you may want to move the saddle directly by pushing on it while turning the screw. The pressure from the string can cause the saddle to remain in the same place otherwise.